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Kapitel 5 Internetdienste 57
Apple-Dienst für Push-Benachrichtigungen (APNs)
Viele Dienste verwenden den Apple-Dienst für Push-Benachrichtigungen (APNs). Der APNs hat
wesentlichen Anteil daran, wie Apple-Geräte Aktualisierungen, MDM-Richtlinien und eingehende
Nachrichten erhalten. Damit Ihre Apple-Geräte diese Dienste verwenden können, müssen Sie
Netzwerkverkehr von diesen Geräten an das Apple-Netzwerk (17.0.0.8) an Port 5223 mit Port 443
als Ausweichoption erlauben.
Bei diesem Datenverkehr handelt es sich um ein geschütztes, binäres APNs-spezisches Protokoll,
das keinen Proxy verwenden kann. Wenn versucht wird, den Datenverkehr zu überprüfen oder
umzuleiten, markieren APNs und der Push-Anbieter die Netzwerkkonversation als beschädigt
und ungültig.
APNs verwendet an den Endpunkten und Servern mehrere Sicherheitsebenen.
Technische Informationen über diese Vorkehrungen finden Sie im
Local and Remote Notification Programming Guide.
57


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